Greetings

Thanks CBG for interest and involvement. As I have already said, a domain-defined function is not useful, since these domains can not be specified through the script that puts this function into a specific simulation program, such as Multisim - for example. For this reason, a single function must be defined to be continuous and derivative on the intervals -4 <Ug <0 and 0 <Ua <375. Otherwise, all the best.

Edited by user 03 June 2018 09:45:08(UTC)  | Reason: Not specified

... please: refresh the previously attached document
φ(x):=[1,x,x^2]

Shall I drop dead @ $ 6110 Canadian Multisim Full ?

Hello Carlos,
I read quick the paper. As it looks, the equation(s) apply to the
circuits with all resistances ... etc.
Some tips to optimize the project.
Nicolas should be happy ... are gone fishing ... how big the fish ?

A most interesting/educative project ... Thanks.

Jean

Tesla_CBG_R1 [optimized].sm (263kb) downloaded 23 time(s).

Hello to everyone.

I studied Norman Koren's articles - everything I found on the internet. I have also studied Eugen Karpov's articles, which seem to be the last to bring improvements to the regressions concerned. I tried myself, to make some modest contributions through an article published here: http://www.tehnium-azi.r...catodici-si-de-grila-r43
If someone is interested, the article also contains a PDF file with the English translation. It does not bother me that you have modeled each curve on the basis of polynomial equations, but that these equations are dependent on a single variable. Assuming that there are regressions in the curves that include the second variable, these regressions could not be used without an interpolation protocol between them, so that they could be covered for the grid voltage a continuous range of real numbers. The model presented by Jean Giraud (though I have not studied it yet) seems closer to what it should be. The problem is the emergence of an additional variable (that β) that has only some discrete values. So it (β) can not be attributed to a concrete physical size and as such the relationship can not be implemented on electronic simulators. That's how things stand until I study the issue of collaboration between SMath Studio and my simulator, my greatest interest is focused on a complicated method of determining coefficients for the Koren equation that I presented in the first post . Otherwise, all the best.

Nicolas.

Edited by user 09 June 2018 16:03:03(UTC)  | Reason: Not specified

Answer:
Similar was done Mathcad 11 via a specific method unpublished.
It is not possible in Smath, only manual .

I have added another model at the end. Can't be automated either.

Jean

Project Tesla_CBG_R1 [optimized] Copy.sm (235kb) downloaded 20 time(s).

From what I understood, the data sets are from unknown lab test.
Digitized from some simulation software or else valid method.
The project is collected and attached in "Samples"
If you have more questions, please do not hesitate.
High quality document for publishing.

Cheers Nicolas, be good ... Jean

Genfit Minimize Tesla (2) Copy.sm (214kb) downloaded 17 time(s).

Ok ... Savant gadgets are just gadgets, proof: the one you have used has muffed
your lab test. L. Koren equation is phenomenological as it says. Unfortunately,
experimental data are not exactly reproducible. Nothing in the circuitry is
reproducible not even the triode/pentode ... think of similar physics wrt T/C
T/C = Thermocouples. In short, the Creator was short of fully understanding what
He was creating.

Your complex attempted formulation does not speak to me.
The attached proposal fits your data sets based on 2 parameters and 2 fixed constants.
The constants are the initials X, Y of each experiment. It needs only two parameters
for each experiment. The model function is not suitable for auto-iterate ... peanut
work to calculate trial/error.
If possible, it would be interesting your collect ~ 20 points, raw ... as measured
with good equipment. No processing, no spline curve junction.

Salut Nicolas, will read you soon ... Jean



Genfit Minimize Tesla(5) Copy.sm (208kb) downloaded 16 time(s).

Hi Nicolas
Hi Jean

I found this page that I hope will be useful:
http://www.valvewizard.co.uk/links.html

It contains a file in excel for the calculation of the triodes graphs




LoadLinePlotter.xls (817kb) downloaded 23 time(s).


Best Regards


Carlos